沉积与特提斯地质2024，Vol.44Issue(3)：467-477,11.DOI:10.19826/j.cnki.1009-3850.2024.09002
西藏边境地区地质灾害分布规律与危险性分析
The distribution and risk assessment of geo-hazards in the border areas of Xizang
摘要
Abstract
A large number of geo-hazards pose a major threat to the economic growth of Xizang's border areas.This paper collects geo-hazards data from 21 border counties in Xizang,and statistics show that there are 3 239 occurrences of geo-hazards in this area,including 768 collapses,697 landslides,and 1 738 debris flows,among which there are 99 large or larger collapses,48 landslides,and 23 debris flows.There are also 21 glacial lake outburst disasters.Based on the characteristics of landforms and climate,the border area is divided into the eastern section(Nanjiabawa Peak-Cuona),the middle section(Cuona-Pulan),and the western section(Pulan-Ritu).The researchers systematically studied the distribution patterns and hazard characteristics of geological hazards in these different sections.The chromatographic analysis method and the information quantity method are used to analyze the risk of geo-hazards in combination with the disaster-causing mechanisms and inducing factors of the geo-hazards in this region.The selected factors include altitude,slope,aspect,water system,stratum,annual average precipitation,and peak ground acceleration.Nine watersheds were identified as high-risk areas for geological hazards.Finally,this paper puts forward following suggestions:focusing on the evaluation of geological safety at construction sites,the disaster chain of landslides and blocking rivers,and the long-term effects of earthquakes,in order to provide a basis for the management and control of geo-hazards risk in the border areas of Xizang.关键词
西藏/边境地区/地质灾害/分布规律/危险性评价Key words
Xizang/border areas/geo-hazards/distribution/risk assessment分类
天文与地球科学引用本文复制引用
高延超,龚凌枫,曹佳文,铁永波,卢佳燕..西藏边境地区地质灾害分布规律与危险性分析[J].沉积与特提斯地质,2024,44(3):467-477,11.基金项目
四川省自然科学基金面上基金(23NSFSC0297) （23NSFSC0297）
中国地质调查局地质调查项目(DD20221746) （DD20221746）
四川省自然资源科研项目(强震区泥石流高拦挡坝的漂木堵塞机制与库损效应研究) （强震区泥石流高拦挡坝的漂木堵塞机制与库损效应研究）
